package widget;


import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.PorterDuffXfermode;
import android.graphics.Bitmap.Config;
import android.graphics.PorterDuff.Mode;
import android.graphics.Shader.TileMode;
import android.graphics.drawable.Drawable;
import android.util.Log;

public class MyImgView {

	/**
	 * 添加倒影，原理，先翻转图片，由上到下放大透明�?
	 * 
	 * @param originalImage
	 * @return
	 */
	public static Bitmap createReflectedImage(Bitmap originalImage) {
		// The gap we want between the reflection and the original image
		final int reflectionGap = 4;

		int width = originalImage.getWidth();
		int height = originalImage.getHeight();

		// This will not scale but will flip on the Y axis
		Matrix matrix = new Matrix();
		matrix.preScale(1, -1);

		// Create a Bitmap with the flip matrix applied to it.
		// We only want the bottom half of the image
		Bitmap reflectionImage = Bitmap.createBitmap(originalImage, 0,
				height / 2, width, height / 2, matrix, false);

		// Create a new bitmap with same width but taller to fit reflection
		Bitmap bitmapWithReflection = Bitmap.createBitmap(width,
				(height + height / 2), Config.ARGB_4444);

		// Create a new Canvas with the bitmap that's big enough for
		// the image plus gap plus reflection
		Canvas canvas = new Canvas(bitmapWithReflection);
		// Draw in the original image
		canvas.drawBitmap(originalImage, 0, 0, null);
		// Draw in the gap
		Paint defaultPaint = new Paint();
		canvas.drawRect(0, height, width, height + reflectionGap, defaultPaint);
		// Draw in the reflection
		canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null);

		// Create a shader that is a linear gradient that covers the reflection
		Paint paint = new Paint();
		LinearGradient shader = new LinearGradient(0,
				originalImage.getHeight(), 0, bitmapWithReflection.getHeight()
						+ reflectionGap, 0x70ffffff, 0x00ffffff, TileMode.CLAMP);
		// Set the paint to use this shader (linear gradient)
		paint.setShader(shader);
		// Set the Transfer mode to be porter duff and destination in
		paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
		// Draw a rectangle using the paint with our linear gradient
		canvas.drawRect(0, height, width, bitmapWithReflection.getHeight()
				+ reflectionGap, paint);

		return bitmapWithReflection;
	}
	//drawable 类型转化为bitmap
	public static Bitmap drawableToBitmap(Drawable drawable) {

		Bitmap bitmap = Bitmap
				.createBitmap(
						drawable.getIntrinsicWidth(),
						drawable.getIntrinsicHeight(),
						drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
								: Bitmap.Config.RGB_565);
		Canvas canvas = new Canvas(bitmap);
		// canvas.setBitmap(bitmap);
		drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable
				.getIntrinsicHeight());
		drawable.draw(canvas);
		return bitmap;
	}

	   public Bitmap GetServerImage( String url)
	   {
		   Bitmap bm = null;
//		   Bitmap resizedBitmap=null;
		   try
		   {
			   String targetUrl = url;// demo
			//   targetUrl = targetUrl + "&dt=" + System.currentTimeMillis();
			   URL imgUrl = new URL(targetUrl);
			   URLConnection conn = imgUrl.openConnection();
			   conn.connect();
			   
			   InputStream is = conn.getInputStream();          
			   bm = BitmapFactory.decodeStream(is);
//			   int width = bm.getWidth();
//			   int height = bm.getHeight();
//			   int newWidth = 120;
//			   int newHeight = 130;
//			   // calculate the scale
//			   float scaleWidth = ((float) newWidth) / width;
//			   float scaleHeight = ((float) newHeight) / height;
//			   // create a matrix for the manipulation
//			   Matrix matrix = new Matrix();
//			   // resize the Bitmap
//			   matrix.postScale(scaleWidth, scaleHeight);
//			   // if you want to rotate the Bitmap
//			   // matrix.postRotate(45);
//			   // recreate the new Bitmap
//			     resizedBitmap = Bitmap.createBitmap(bm, 0, 0, width,
//			   height, matrix, true);
			   is.close();
		   }
		   catch (Exception e) 
		   {
			  Log.e("GetChannelImage", e.getMessage());
		   }
		   return bm;
	   }
}
